深部围岩流固耦合蠕变-突变全过程演化规律研究

项目名称： 深部围岩流固耦合蠕变-突变全过程演化规律研究

项目编号： No.51274109

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 张树光

作者单位： 辽宁工程技术大学

项目金额： 78万元

中文摘要： 随着煤矿开采深度的加大，深部围岩的破坏过程往往发生无前兆的突变或异常，巷道变形失稳等灾害在我国绝大部分深部矿井中频发，导致巷道反复维护乃至矿井的停产和停建。深部围岩所处的地质环境决定了地应力、渗流及其耦合作用在其变形失稳过程中起关键作用，深部围岩变形失稳的过程和演化规律还有待进一步研究。项目采用实验研究、理论分析和数值模拟相结合的方法，研究流固耦合作用下深部围岩的蠕变-突变全过程；基于矿山岩体力学、流变力学和流固耦合理论，建立和验证描述深部围岩的流固耦合蠕变-突变全过程数学模型，确定蠕变发生条件、阶段转化条件(判据)及突变启动条件；施加发生蠕变-突变的应力、孔隙压等参数和条件，采用基于有限元的动网格自编程序模拟蠕变-突变全过程；分析模拟结果与实验结果，阐明应力和渗流的耦合作用机制，揭示流固耦合作用下深部围岩由蠕变变形到突变失稳的演化规律。为深部工程的巷道加固、灾害防治和支护设计提供基础。

中文关键词： 深部围岩；;流固耦合；蠕变-突变；全过程；演化规律

英文摘要： With an increase of coal mining depth, the breakage process of deep surrounding rock will be catastrophic and abnormal without any indication. Engineering disasters such as deformation and failure of roadway often occur in most of the deep mines in our country. These problemes may lead directly to repeated maintenance of roadway and shutdown or halted construction of mine. Geological environment of deep surrounding rock determined geostress, seepage and its synergistic effect which play important role in the process of deformation failure. The process and evolution of instability of deep surrounding rock require further study.Experimental research, theory analysis and numerical simulation should be well combined to study overall process of creep-catastrophy in deep surrounding rock. Based on mining rock mechanics and fluid-solid coupling theory,a fluid-soild coupled mathematical model will be built to describe overall proces of creep-catastrophiy in deep surrounding rock, and the model will be validated and modified through experiment.The starting condition of creep, transform condition or criterion at different evolution periods and starting condition of catastrophy will be determined.By using the dynamic meshes，the self-programming based on finite element method(FEM) is used to simulate the overall process of

英文关键词： deep surrounding rock；fluid solid coupling；coupling;creep and catastrophy；overall process；evolution law